...there are zero examples of non-web businesses using App Engine to change the nature of their IT processes. (See ElyLilly's story for an AWS counterpoint.) So, all of this might lead you to believe I'm anti-App Engine, or at least...
http://news.cnet.com/8301-19413_3-10148273-240.html
...that the bex service is robust and secure for you and your trading partners. This is why organisations such as baa, ElyLilly and Office World have chosen to use beX. The beX service currently (june 2004) processes over six million transactions...
http://www.burnsecs.com/q_&_a.htm